The aim of the present study is to identify factors (such as symptom patterns and symptom scores) that influence the response to treatment with pantoprazole using different evaluation methods (e.g., ReQuest™ questionnaire, patient and investigator assessment). Pantoprazole will be administered once daily in the morning at one dose level. The study duration consists of a treatment period of 8 weeks. The study will provide further data on safety and tolerability of pantoprazole.